If this package is installed alongside the exim MTA, and you enable
EXIM_REPORT_WEEKLY_HTML in /etc/sysconfig/exim, logrotate/cron will
create HTML reports in /srv/www/eximstats.
You can edit /etc/apache2/conf.d/eximstats.conf to configure your
webserver for the reports.
The script /usr/sbin/eximstats-html-update.py can create the reports
for log files that were rotated in the past. (You would only run this
once, if at all. The rest is done by logrotate / cron.)